Sample Type is Igneous › Volcanic › Felsic Extrusive › Rhyolite
42 records | Download| IGSN | Sample Type | Notes | Location | Number Thin Sections | Storage Location |
|---|---|---|---|---|---|
| GRD00GBS0 | Rhyolite | Very altered rhyolite from 595 Ma Lynn-Mattapan volcanic complex. Thin section in Wards Micro Slides box in Ritter 154. | Massachusetts | 1 | Camp Elliott |
| GRD00GCS0 | Rhyolite | Rhyolite with flow bands. Minerals include topaz, spessartine, quartz, sanidine. | Colorado | 1 | Ritter 154, 15 G |
| GRD00GFS0 | Rhyolite | altered black porphyritic rhyolite. Part of Marblehead Neck volcanic plug (dark fine grained rhyolite and lighter volcanic breccias) | Massachusetts | 1 | Ritter 154, 15 G |
| GRD00GYS0 | Rhyolite | rhyolite porphyry (Ks>Pl, Hb, Q). Porphyritic rhyolite, with K-spar and phenocrysts | 0 | Ritter 154, 15 G | |
| GRD00I0S0 | Rhyolite | rhyolite porphyry (euhedral Q-Ks) | 0 | Ritter 154, 15 G | |
| GRD00IJS0 | Rhyolite | rhyolite cobbles (Q-Ksp) | 0 | Camp Elliott | |
| GRD01ZCS0 | Rhyolite | Small cut pebble. Looks and feels like a dense form of pumice. Original label: 10 November, 1980. | Pacific Ocean | 1 | Ritter 154, 37 A |
| GRD02N6S0 | Rhyolite | Two pieces of Bishop Tuff. Quartz and brown fiamme in pink groundmass. Original description: Rhyolitic Tuff - Bishop Tuff. Chalky white alteration crust. | California | 5 | Ritter 154, 3 F |
| GRD02QMS0 | Rhyolite | Flow banded rhyolite | California | 0 | Ritter 154, 15 L |
| GRD02ROS0 | Rhyolite | Aphanitic texture. | Mexico | 2 | Ritter 154, 3 E |
| GRD02W3S0 | Rhyolite | Rhyo-dacite cobble from exposures on sea cliff north of SIO pier. These cobbles form Poway fm cgl, the source was in Sonora Mexico | California | 0 | Ritter 154, 15 G |
| GRD042AS0 | Rhyolite | Puerto Rico | 0 | Ritter 154, 29 L |